Pycnometer



FIG. 1 is a front view of a pycnometer, showing my new design, the rear view being a mirror image whereof;

FIG. 2 is a side view of the pycnometer, the other side being a mirror image whereof;

FIG. 3 is a top view of the pycnometer;

FIG. 4 is a bottom of the pycnometer; and,

FIG. 5 is an exploded view of the pycnometer.

The broken line showing is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a pycnometer, as shown and described. 